<template>
    <div class="app-container">

         <!--查询表单-->
        <el-form :inline="true" class="demo-form-inline">
            <el-form-item>
                <el-input v-model="courseQuery.title" placeholder="课程名称"/>
            </el-form-item>
            <el-form-item>
                <el-select v-model="courseQuery.status" clearable placeholder="发布状态">
                <el-option :value='1' label="未发布"/>
                <el-option :value='2' label="已发布"/>
                </el-select>
            </el-form-item>

            <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
            <el-button type="default" @click="resetData()">清空</el-button>
        </el-form>

        <!-- 表格 -->
        <el-table
        v-loading="listLoading"
        :data="list"
        element-loading-text="数据加载中"
        border
        fit
        highlight-current-row>
            <el-table-column
                label="序号"
                width="70"
                align="center">
                <template slot-scope="scope">
                {{ (page - 1) * limit + scope.$index + 1 }}
                </template>
            </el-table-column>

            <el-table-column prop="title" label="课程名称" width="1400" align="center"/>

            <el-table-column label="课程状态" width="80" align="center">
                <template slot-scope="scope">
                {{ scope.row.status==='Normal'?'已发布':'未发布' }}
                </template>
            </el-table-column>

            <el-table-column prop="lessonNum" label="课时数"  width="80" align="center"/>

            <el-table-column prop="gmtCreate" label="添加时间" width="160" align="center"/>

            <el-table-column prop="viewCount" label="浏览数量" width="100" align="center" />

            <el-table-column label="操作"  align="center" >
                <template slot-scope="scope">
                <router-link :to="'/course/info/'+scope.row.id">
                    <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
                </router-link>
                <router-link :to="'/course/chapter/'+scope.row.id">
                    <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲</el-button>
                </router-link>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>

        <!-- 分页 -->
        <el-pagination
        :current-page="page"  
        :page-size="limit"
        :total="total"
        style="padding: 30px 0; text-align: center;"
        layout="total, prev, pager, next, jumper"
        @current-change="getList"
        />


    </div>
</template>

<script>
//引入调用teacher.js文件
import course from '@/api/edu/course'

export default {
    //写核心代码位置
    // data:{
    // },
    data(){ //定义变量和初始值
        return {
            list:null,  //查询之后接口返回的集合
            page:1, //当前页
            limit:6,   //每页记录数
            total:0,    //总记录数
            courseQuery:{} //条件封装对象
        }
    },
    created(){ //页面渲染之前执行,一般调用methods定义的方法
        this.getList();
    },
    methods:{ //创建具体的方法,调用teacher.js定义的方法
        //讲师列表的方法
        getList(page=1){
            this.page=page
            course.getCourseList(this.page,this.limit,this.courseQuery)
                   .then(response =>{
                       //response接口返回的数据
                       this.list = response.data.list
                       this.total = response.data.total
                   })//请求成功
                   .catch(error => {
                       console.log(error)
                   }) //请求失败
        },
        resetData(){ //清空的方法
            //表单输入项数据清空
            this.courseQuery={}
            //查询所有讲师数据
            this.getList()
        },
         //删除课程的方法
        removeDataById(id){
          this.$confirm('此操作将永久删除讲师记录, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {  //点击确认,执行then方法
          //调用删除的方法
            course.deleteCourserById(id)
                   .then(response => { //删除成功
                        //回到列表页面
                        this.getList()
                   })
            this.$message({
                type: 'success',
                message: '删除成功!'
           })
          })
        }
    }
}
</script>